diff options
Diffstat (limited to 'drivers/gpio')
-rw-r--r-- | drivers/gpio/gpiolib.c | 32 | ||||
-rw-r--r-- | drivers/gpio/gpiolib.h | 3 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 5db3445552b1..697c40983246 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -90,6 +90,38 @@ struct gpio_desc *gpio_to_desc(unsigned gpio) EXPORT_SYMBOL_GPL(gpio_to_desc); /** + * Convert a GPIO name to its descriptor + */ +struct gpio_desc *gpio_name_to_desc(const char * const name) +{ + struct gpio_chip *chip; + unsigned long flags; + + spin_lock_irqsave(&gpio_lock, flags); + + list_for_each_entry(chip, &gpio_chips, list) { + int i; + + for (i = 0; i != chip->ngpio; ++i) { + struct gpio_desc *gpio = &chip->desc[i]; + + if (!gpio->name) + continue; + + if (!strcmp(gpio->name, name)) { + spin_unlock_irqrestore(&gpio_lock, flags); + return gpio; + } + } + } + + spin_unlock_irqrestore(&gpio_lock, flags); + + return NULL; +} +EXPORT_SYMBOL_GPL(gpio_name_to_desc); + +/** * Get the GPIO descriptor corresponding to the given hw number for this chip. */ struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index bf343004b008..78e634d1c719 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -89,7 +89,10 @@ struct gpio_desc { #define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */ #define FLAG_IS_HOGGED 11 /* GPIO is hogged */ + /* Connection label */ const char *label; + /* Name of the GPIO */ + const char *name; }; int gpiod_request(struct gpio_desc *desc, const char *label); |